CVE-2021-45630Network attack vector

Unauthenticated command execution via undisclosed input handling

Published Dec 26, 2021 · Updated Aug 4, 2024

Command injection in NETGEAR CBR40, CBR750, and Orbi 750/850 WiFi systems allows remote attackers to execute commands before authentication. NETGEAR has not published the affected interface, parameter, or command-construction path, so the precise input-handling error is undisclosed. Network access to CBR40 before 2.5.0.24, CBR750 before 4.6.3.6, or the listed Orbi 750/850 models before 3.2.17.12 is sufficient for arbitrary command execution on the device.

CVSS severity9.8
Critical
EPSS probability1.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in NETGEAR CBR40, CBR750, and Orbi 750/850 WiFi systems allows remote attackers to execute commands before authentication. NETGEAR has not published the affected interface, parameter, or command-construction path, so the precise input-handling error is undisclosed. Network access to CBR40 before 2.5.0.24, CBR750 before 4.6.3.6, or the listed Orbi 750/850 models before 3.2.17.12 is sufficient for arbitrary command execution on the device.

The record

CVE
CVE-2021-45630
Published
Dec 26, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-77, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 26, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10.0MITRECVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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